A key road between Falmer and Woodingdean has been closed while Sussex Police break up an overnight rave.
The police were called out shortly before 3am by people living near the site off the B2123 Falmer Road.
The road has been closed for several and at 10am today (Sunday 16 April) the police were unsure how long it would take to disperse the crowd and deal with the scene.
A spokesman said: “There’s been an incident that’s meant we’ve had to close the road and it’ll be closed for some time. We don’t know how long.”
Traffic was diverted via Lewes Road, Brighton.